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  2. /Four statements about the spectrum of atomic hydrogen are given below. (i) Atoms excited to the level n = 5 can give ten different lines in all. (ii) The series limit wavelengths of the Lyman and Balmer series are in the ratio 1 : 4. (iii) A photon at the limit of the Paschen series has an energy of 3.4 eV. (iv) Every line of the Lyman series has a shorter wavelength than every line of the Balmer series. How many of the statements above are correct?
PhysicsHardHigh School (11–12)Modern Physics › Atoms and Atomic SpectraNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
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Four statements about the spectrum of atomic hydrogen are given below. (i) Atoms excited to the level n=5n = 5n=5 can give ten different lines in all. (ii) The series limit wavelengths of the Lyman and Balmer series are in the ratio 1:41 : 41:4. (iii) A photon at the limit of the Paschen series has an energy of 3.4 eV3.4\ \text{eV}3.4 eV. (iv) Every line of the Lyman series has a shorter wavelength than every line of the Balmer series. How many of the statements above are correct?

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← Two statements about the Bohr model of the hydrogen atom are given below. Statement I: In every Bohr orbit of hydrogen, the kinetic energy of the electron is equal to half the magnitude of its potential energy. Statement II: The period of revolution of the electron in the n = 2 orbit is four times that in the n = 1 orbit, because the radius is four times larger.In the figure, the de Broglie wave of the electron of a hydrogen atom closes on itself along the circular orbit of radius 0.846 nm. The standing wave makes the orbit allowed, and the number of whole waves round it is the quantum number of the orbit. Take h = 6.63 × 10⁻³⁴ J s and an electron mass of 9.1 × 10⁻³¹ kg. What is the speed of the electron in this orbit? →
More onModern Physics › Atoms and Atomic Spectra

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